1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anit [1.1K]
3 years ago
12

An atom of radium (Ra) forms a monatomic ion.

Chemistry
1 answer:
Agata [3.3K]3 years ago
3 0

Answer:

The atomic number of the element Radium (Ra) is 88. It is an alkaline earth metal. Electronic configuration of Radium (Ra) will be [Rn]7s^{2}[Rn]7s

2

It belongs to the group IIA of the periodic table. Alkaline earth metals that belong to the group IIA of the periodic table lose the valence electrons to form a +2 ion.

Therefore, Radium with an electronic configuration of [Rn]7s^{2}[Rn]7s

2

will lose the two 7s electrons to form the cation with +2 charge.

You might be interested in
An example of a non-electrolyte is<br> 1. H2O (I)<br> 2. NaCl (aq)<br> 3. K2SO4 (aq)<br> 4. HCI (aq)
shepuryov [24]

Answer: H2O

Explanation: pure H2O does not contain ions which could

Transfer charge. Other substances in water solution forms ions.

6 0
3 years ago
Which element is a metalloid?
kari74 [83]
Hi , the answer is silicon.
3 0
4 years ago
A sample of wood with a mass of 30 g has its
anzhelika [568]

Answer:

0.086J/g°C

Explanation:

The following data were obtained from the question:

Mass (M) = 30g

Initial temperature (T1) = 10°C

Final temperature (T2) = 45°C

Change in temperature (ΔT) = T2 – T1 = 45°C – 10°C = 35°C

Heat (Q) released = 90J

Specific heat capacity (C) of wood =..?

We can obtain the specific heat capacity of the wood as follow:

Q = MCΔT

90 = 30 x C x 35

Divide both side by 30 x 35

C = 90/(30 x 35)

C = 0.086J/g°C.

Therefore, the specific heat capacity of the wood is 0.086J/g°C.

5 0
3 years ago
How many molecules are contained in 3 moles of water molecules , H2O?
klemol [59]

Answer:

The answer is “3 moles of molecules”.

6 0
3 years ago
Problem: Janna, a student of a chemistry class, told her friend that she learnt in class that bottled water is not pure. Kim, he
Ghella [55]

Answer:

The bottle is labeled pure so it probably is pure.

Explanation:

4 0
3 years ago
Other questions:
  • Three isotopes of oxygen are oxygen-16, oxygen-17 and oxygen-18. Write the symbol for each, including the atomic number and mass
    15·1 answer
  • Your doctor is looking at a sample of your blood to see if you have an infection. what instrument will he need to use to be able
    5·2 answers
  • what is the main 'impurity' collected with the oil in distillation. PLEASE HELP IM IN END OF YEAR EXAM. II WILL GIVE BRAINLIEST
    5·1 answer
  • A swimming-pool worker wants the pool's pH to be 7.2. She comes by to test the water and finds that the pH is 9.2. What should s
    12·2 answers
  • What happens to solid when mixed with other solid
    12·1 answer
  • The mass of 10 moles of ammonia is 17 grams.
    14·1 answer
  • CH3CHClCH(CH3)CH2CH2CH2CH2Br name the molecule iupac rules please
    10·1 answer
  • How many liters are in 4 moles of a gas at stp?
    12·1 answer
  • What does pH measure? Why is a pH of 7 considered to be neutral?
    8·2 answers
  • Which ion has the lower ratio of charge to volume? Explain.<br> (g) Fe³⁺ or Fe²⁺
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!